Transcript

Welcome to the fourth lecture in this week. We are discussing about the prototyping here and we are trying to demonstrate a few prototypes that we have developed in this laboratory. The next prototype that I would like to discuss is the pineapple peeler. So this helps to peel the pineapple. How does this work? We will show you the demonstration. We can keep rotating the pineapple, and with the help of the blade and we can peel that. Otherwise peeling the pineapple manually, we need to have a peeler and there is also a lot of force that is required. So this can peel the pineapple. In 2 or 3 cylindrical runs, it can peel the complete pineapple.

So what the components does it have. It has a cutter there. It has a cutter. So on the rod of the handle. So on the rod of the handle the cutter is attached, and this rod is further fixed to a 360° rotating strip here. So it can rotate in two directions, you can see. In this direction it can rotate and it can also rotate in this direction 360° strip. So this a 90°strip. Also all these things are fixed on a frame. This frame is attached on a bucket using U clamps. You can see these three U clamps. So this bucket would carry all the scrap, all the peeled material. And how is pineapple rotated. It is rotated manually using these rollers. These rollers we can control it manually.

We can control wherever the pineapple harness is lower or higher. We can control that. We can peel more or less. And these are attached, these rollers are attached. The fruit is attached to the rollers using a holder, that is having pins on it. So it is spring loaded, this is the spring. See you can take the peeled pineapple, though it is not peeled completely, but to take it off, just to show you. So there are certain 4 to 5 pins on this fruit holder. So this is also one of the implements. We can develop multiple or many these kind of machines, using design thinking approach. The similar design thinking approach that we are teaching in this course is employed to develop these kinds of components.

So similar to this we have another machine. This is automated solid stone grinding machine. So this use a rotary motion, manual rotary motion to grind the vegetables or fruits, those are available in the small portions. So it has certain components here, you can see a big frame here. The big frame has two vertical pillars. And with two vertical pillars, three horizontal frames. Three horizontal portions are welded actually. So this is a welding done here. Because this is the final prototype. This is a high fidelity prototype. Or we can also call it a final saleable product, at this point of time. So it has two bearing holders on the top and the middle frame. And within the bearing holders we have bearings. When we rotate it, the bearing helps to keep the shaft in a central alignment.

This is shaft in between here. You can see this green shaft. This is a green shaft. This shaft is attached to a cam. That is attached to another shaft. That is there attached with the stone hammer. Stone hammer is now put in a stone cup. So when we rotate it. When we put fruit in it. It turns it into the paste. It turns the fruits or vegetables, the small dices of the vegetables, the small prunings of the vegetables into paste. So now it is being rotated manually. So you can see, in between there are two pulleys. There is one big pulley. One big pulley. This big pulley has a belt on it. Also this can be operated using a motor. You can see, just below the pulley there is a motor. This motor can be given some electrical supply, and this can also be operated using some electric supply.

So this is one of the machine that is manual chutney making machine, or we call it the solid stone grinding machine. So similar to this we have another machine. This is very simple yet effective machine, that is developed for tying the fruits. I need fruits or vegetables that have feather or leaves in them, like we have green onions here, we have spinach, we have radish with leaves. So this can be tied very quickly. So what is this. We have V here in this component. In this V we put the thread used for tying. We put the amount of the vegetable that is to be tied. And we quickly make it a knot. And cut it. This is a quick way to tie the fruit or the vegetables that we have. Yes this machine can have certain varieties of certain quantities of the wood. You see it has an adjustable frame here. So the space on the base frame can be varied while adjusting the frame. So we can just make it move inward or outward. So similarly we will just show you the demonstration while tying the spinach here. Then put some spinach. And we will tie a knot here. This can now be cut. Yes we have also brought green onion. Spinach is now tied.

This is very effective tool for making quick bunches of the fruit here. Fruit or vegetables. Similarly we can do for green onion. In green onion, we can make two knots if the fruit is lengthier. We can have two threads tied here. We can even tie it close to the head of the crushed onion here. So what was the drudgery. Look keeping the thread and then keeping the fruit on the base. So we didn’t have the right quantity of the fruit. In this when we fix the distance between these two frames, the quantity of the fruit can be highly fixed. It can be close to whatever quantity we want to tie, we want to make the bunches of. So this is also one of the machines.

So similar to this we have another machine. This is the mechanically operated peer separator. Peer separator from plant. So any plant maybe peanut separator, maybe rice separator. It is generally designed for peanut. So we have peanut plant here, in which peanut is there. And this can be separated using this machine. How does it work, we will show you. So it is actually foot operated. Just for demonstration we are operating with hand. It is foot operated because the person generally sits, and then he operates this machine. It is rotated using a cam mechanism. So how is peanut separated, we will demonstrate that. So peanut is put here and it is separated from the plant. The peanut is here and it is separated from the plant. You can see the separated peanuts. So the whole fruit is separated within this machine.

What are the components of this machine? This machine has a base that is A frame. This is A frame on which all these components are attached. So we have a peddle. On the peddle we have cam shaft attached. That cam shaft is attached to the cam. Now it is further attached to the main shaft. That is rotating shaft, which is put in a hub. And it is held in the hub using two bearings. Two bearings are there to hold this and we have two plates. One is an outer and inner plate. In between the plates we have small cutters. Small cutting strips. These cutting strips helps to take or separate the peanuts from the plant. So when we operate the peddle. It is a similar mechanism that is there in the sewing machine. So when we operate the peddle the cam rotates. And the speed of this can also be controlled while operating or rotating the pedal slowly or in a fast fashion. That is depending upon the amount of fruit we need to separate.

So this is also one of the mechanisms we have developed at IIT Kanpur. In this week we have discussed certain prototypes. We have discussed in detail from drafting to a final prototype for the grain filling machine that weighs bags of the grain and also it fills the bags of the grain. Then we discussed about certain prototypes like we discussed about the seed separator. We discussed about the stone chutney making machine, then fruit tying machine. Specific amount of fruit can be tied, bunches of fruits can be made. Certain prototypes have been discussed. So I think this might have given you some feel that how these prototypes are being developed and how do we work on them. Yes testing part is taken by the actual users. We have tested these machines with the vegetable vendors, with the farmers and they have given us a very good feedback as well.

So next week we will meet and discuss about certain case studies for discussing the whole design thinking process that we have discussed in the previous weeks.

Thank You.